diff --git a/test/serialization_nvp_test.cpp b/test/serialization_nvp_test.cpp
index cc73d20..0eee020 100644
--- a/test/serialization_nvp_test.cpp
+++ b/test/serialization_nvp_test.cpp
@@ -34,7 +34,7 @@ int main()
 
     std::string s = os.str();
 
-    X x2 = {};
+    X x2 = { 0, 0 };
 
     {
         std::istringstream is( s );
diff --git a/test/serialization_split_free_test.cpp b/test/serialization_split_free_test.cpp
index 20fddab..cead4ad 100644
--- a/test/serialization_split_free_test.cpp
+++ b/test/serialization_split_free_test.cpp
@@ -45,7 +45,7 @@ int main()
 
     std::string s = os.str();
 
-    X x2 = {};
+    X x2 = { 0, 0 };
 
     {
         std::istringstream is( s );